×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

#### Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

# plotting circumference

## plotting circumference

(OP)
hi mans!.
how can i plot a circumference in matlab knowing the equation?..such as x^2+y^2+3x-2=0...

thanks

### RE: plotting circumference

set up a parametric equation in i and then plot x(i) against y(i)

Cheers

Greg Locock

SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.

### RE: plotting circumference

(OP)
i don't understand...how can i set parametric equation?..
i can't plot with matlab  in implicit form..but only
plot(x,t)...
oh god!

### RE: plotting circumference

(OP)
i find this :

but i try the example:
plot(plot::Implicit2d(x^2+y^2-1, x = -1..1, y = -1..1))

and matlab find an error..
>> plot(plot::Implicit2d(x^2+y^2-1, x = -1..1, y = -1..1))
??? plot(plot::Implicit2d(x^2+y^2-1, x = -1..1, y = -1..1))
|
Error: Unexpected MATLAB operator.

how can i resolve?
thanks

### RE: plotting circumference

Is this for school?

#### Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

#### Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Close Box

# Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!